Using presenceOf validator on a File element

I'm making a Form in order to upload a file. I added a validator in order to check if the File filed is empty. But i already check this in my controller and furthermore the validation returns always false although without the validation, the field works perfectly fine.
So is there a way/reason to us presenceOf validator on a File Element in a form ?

As you can see i've commented the validator and i'm validating the file field manually in the controller . I'm wondering if the solution with the validator which ain't working in my case is a better solution or not ?